'Hours' in the Bible

Jesus replied, Are [there] not twelve hours in the day? If anyone walks around in the daylight, he does not stumble, because he sees the light of this world.

And it happened that [there was] an interval of about three hours, and his wife came in, not knowing what had happened.

But [when they] recognized that he was a Jew, they were shouting with one voice from all [of them] for about two hours, "Great [is] Artemis of the Ephesians!"